main.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home:  MessageTile(),
    );
  }
}

class MessageTile extends StatelessWidget {

 
  final userName = 'Mark';
  final message = 'You have pushed the button this many times:';
  final scaleFactor = 6.5;
  @override
  Widget build(BuildContext context) {
    final lineLength = userName.length > message.length
        ? userName.length.toDouble()
        : message.length.toDouble();

    return Scaffold(
      appBar: AppBar(
        title: const Text('Testing'),
      ),
      body: Container(
        margin: const EdgeInsets.all(10),
        padding: const EdgeInsets.all(5),
        height: 70,
        width: 300,
        decoration: BoxDecoration(
          color: Colors.grey,
          border: Border.all(color: Colors.blueAccent),
          borderRadius: const BorderRadius.all(
            Radius.circular(10.0),
          ),
        ),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(userName),
            SizedBox(
              width: lineLength * scaleFactor,
              child: const Divider(color: Colors.red),
            ),
            Text(
              message,
            ),
          ],
        ),
      ), // message container
    );
  }
}